<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    function * gen(arg){
      console.log(arg)
      let one = yield 111
      console.log(one)
      let two = yield 222
      console.log(two)
      let three = yield 333
      console.log(three)
    }

    //执行获取迭代器对象
    let iterator = gen('AAA')
    console.log(iterator.next())
    //next方法可以传入实参
    console.log(iterator.next('BBB'))//console.log(one)
  </script>
</body>
</html>